* The name is misspelled: Double-check the spelling of the author's name.
* The author is not widely known: Perhaps they are a newer author or write in a niche genre.
* The author uses a pseudonym: It's possible that Jack Cahill is a pen name.
To find more information, you could try:
* Searching online databases: Try searching for the author's name on websites like Goodreads, Amazon, or WorldCat.
* Checking library catalogs: Search for the author's name in your local library catalog.
* Contacting literary agents or publishers: If you have any information about the author's genre or area of expertise, you could contact literary agents or publishers in that field.
Please provide more context or details about the author, such as the type of books they write, if you have any. This will help with finding more information about them.